Air-brush.



B. E. HOLTON.

AIR BRUSH.

APPLICATION FILED APR. 30, me.

Patented Jan. 21, 1919.

8 ll 5 I 2 7 3 Im/en/ivf:

Darohwrd E. H olton,

' IBIRCHARD E. HOLTON, 033 LOS ANGELES, ('JAI'aIFOB/NIA AIR-BRUSH.

Specification of Letters Patent.

Application filed April s'o, 1916. Serial No. 231,763.

To all whom it may concern;

Be it known that I, Bmcnano E. HoL'roN, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Air-Brushes,

,of which the following is a specification.

My invention relates to air brushes and consists of the novel featuresherein shown, described and claimed.

One of the principal objects of my invention is to make a material tubefor delivering the material to the point of the atomizer, the tube beingremovable and interchangeable, so that by manipulating a set screw atube carrying one material may be removed, and another tube carrying adifferent material instantly applied.

- Another-object of my invention is to make anair brush, in which theair and material connections are both at the extreme rear end of themain head, and above the hand-hold,

so'as to avoid the trouble of having the hose connections dragging overthe fresh work.

Another object of my invention is to make a single trigger control forthe air and meterial, and to provide adjustments so that the air will beturned on before the materialis turned on, and so that the flow ofmaterial ma be accurately regulated,

Figure l is a side elevation of an air brush embodying the principles ofmy invention.

. Fig. 2 is a sectional elevation on a plane parallel with Fig; 1. t

Fig. 3 is a front elevation looking in the direction indicated by thearrows 3 in F igs. 1 and 2, parts being broken away and shown insections,'and parts being broken away to economize space. I v

if The nozzle support 1 is cylindrical in end elevation and a bore 2 isformed from the front end face, the forward end of the bore beingscrew-threaded, and there being a lateral port 3 leading to the bore,and a seat 4 around theouter end of the port. The paint nozzle 5 isscrewed into the bore 2,

and has an orifice 6 leading through its tip,

1 conical.

and a valve seat 7 at the inner end of the orifice, and a passage 8leading from the bore 2 to the valve seat .7. In front of the end faceof the support 1, the nozzle 5 s The air nozzle 9 is screwed upon theend of the support 1 concentric to the paint noz-1 .the support 1, incommunication-with the chamber 11. 1 a r The main frame 13 has acircularhead '14 provided with a nipple'1'5; and; a' piece of tubing 16 fitstightly upon the nipple-15. {A

corresponding nipple l7-is formed upon the rear end of the support 1,and fits tight in a the end of they tubing 16, so as to connect thesupport 1 to the main frames The main frame 13 has a housing chamber 18extending backwardly from the head 14. "A' bear- Patented Jan. 21,1919.I

ing 19 is formed 'at"the"rea'r end of this chamber. The paint valvestem20 isslidingly mounted in the bearing 19, and extends through thechamber 18, through the head 14, the nipple 15, the tube 16, the nipple17,

and the bore 2, to the valve seat 7, and has: a

needle oint 21 extendinginto orthro'ugh the ori ce 6. An expanslve coilspring 22 is placed upon the valve stem 20, in the chamber 18, againstthe forwardend ofthe bearing 19, and 'engagesaspring s'e'at upon thestem 20, the tension of thes'prin'g 22 being exerted to hold theneedlepoint21 against the valve seat 7, to stop the fiovv'of paint. Atrigger 24 is pivotally mounted upon a pin 25 in the upper part of the"chamber 18,.and extends downwardly through the wall of the chamber. p f

The main frame 13 has a removable side plate 26, so that when the plate'2 6' is removed, the chamber 18 is open, as in 2, 1'

the side plate being secured in place fby screws 27. The'air hpse' 28slips upon the nipple 29, and the nipple 29 is 'connectedto the airvalve casing 30' by a union The principal part of the air valve casing30 is located within the chamber 18, there being a notch 31 in the rearwall of the main frame, so that the valve casing isplaced, in

the notch, and the plate 26 a plied to hold,

the casing in place. Set scr ws 32a re, iii

,serted through the plate26 to engage the forward end of the casin'gBO,and a slmilar set screw-is inserted through the. back side of theframe-to engage the other side ofthe casin 30. A valve seat 33 isformedlin the valve casing 30, a valve stem 34 -is slid- "384s formedaround the nipple 17 said pipe 39" ingly mounted in the casing, theforward end of the stem 34 engaging a cam 85 projecting backwardly fromthe trigger 24. A valye-J3,6, u-pon the valve stem 34 engages a seat 33,and a spring 37 is inserted behind the valve, the tension of the springbeing exerted to hold the valve closed. A chamber the stem34, in frontof the va'lve seat 33,and a pipe 39 leads later ally from the chamber38, through the wall ofi'the' valve casing, 33, and then forwardlythrough the nipple 15, and into the end of connecting with theports12,leadi'ng "to the chamber 11 and to the orifice 10. A U.-shapedlink 40 extends around the pipe'39, and hasa bearing por-. tion 41 inposition to engage the spring seat 23'; the ends of the link beingconnected againstthe stem 20, there being lost motion to the-trigger 24.by spring 42 connects the bearing portion 41 to thetrigger 24, thetension of thespring being exerted to hold the bearing portion 41between the bearing portion 41 and the spring seat 23, so that thetrigger 24 may be operated to unseat the valve 33, and allow air' toblow through the orifice 10, without 5 unseating theneedle 21, to openthe orificeb,

I ing to needle 21 from andthen continued operation of the triggerbring-the bearing portion 41, into engageinent" with the valve 23,- andunseat the i the seat 7, to open the orifice 6 to the desired extent.The object being to operate both valves with a single trigger and tomake it easy to use the device as a'blower, and at' thesame time havethe paint shut off, and then after the air is flowthe desired extent, toturn on the paint as desired. I

A s'et'screw 43 is screwed through the wall of the frame 13, directlybehind the lower end of the trigger 24, so-that by manipulating the setscrew, an adjustable stop is formed to accurately limit the movement ofthe" trigger, so as to limit the opening of the paint valve. A hand-holdor grip 44 extends downwardly from the'main'frame- 13.

i A paint hose 45 is slipped upon a nipple 46 and the nipple 46 issecured to the paint tube 47, by a union 48.

A seat 49 is, formed upon the upper side and rear end of :the

frame 13, to receive the rear end of the tube 47, and the forward end Aof'the tube is turned downwardly and fixed 4. A s'etscrew support 5Oextend upwardly from the back side of the frame 13, and

-- the paint over the seat 49-, and the setscrew' 51 mounted verticallythrough this set. screw support engages a seat 52 upon the paint tube47, to hold the rear'end of tube rigidly in place. A second set screwsupport 53 extends upwardly from the sides of the nozzle support 1, uponopposite sides of the seat 4, and has a crossbar 54 through which theset screw 55 opertube 47, and

and connecting a pin 41. A retractile coil naeaem ble to place the painthose 45 above the air hose 28, at the rear end of the mainframe, and atthe same time deliver the material directly to the nozzle, thus avoidingthe lia- "bility of the paint hose dragging over the fresh work, as inthe old constructions, where the paint hose extended downwardly from thenozzle.

Various changes may be made in the arrangement and details ofconstruction without departing from the spirit of my invention asclaimed. 1

I claim:

1. In an air brush, a main frame, a paint nozzle mounted upon theforward end of the main frame, an air nozzle mounted upon the forwardend of the main frame around the paint nozzle, a valve for controllingthe passage of paint to the-paint nozzle, a valve for controlling thepassage of air to the air nozzle, a paint tube removably mounted uponthe main frame and discharging into the paint nozzle.

2. In an air brush, a main frame, a paint nozzle upon themain frame, apaint valve construction for controlling the paint nozzle, an air,nozzle around the paint nozzle, an air valve construction forcontrolling the air nozzle, a paint tube mounted on top of the mainframe and connected to the paint nozzle, and having a nipple adapted for0on nection to a paint hose, and means whereby the paint tube may beremoved.

3. In an air brush, a main frame, a paint nozzle mounted upon theforward end of the mainframe, an air nozzle mounted upon the forward endof the main frame around the paint nozzle, a valve for controlling thepassage of paint to the paint nozzle, a valve for controlling thepassage of air to the air nozzle; there forward and rear ends of the topof the frame; a set-screw support extending upbeing paint tube seats atthe.

'wardly over the rear seat, a set-screw in the 4. Inan air bru sh, amain frame, a paint nozzle upon the main frameila paint valveconstruction for controlling e paint nozzle,

an air nozzle around'the paintnozzle, an air 5 valve construction forcontrolhng the an nozzle, a. trigger for controllin I constructmns, a.set-screw the two valve or adjustably controlling the movement of thetrigger, and a paint tube mounted on top of the main frame and connectedto the paint nozzle.

In testimony whereof I have signed my name to this specification.

BIRCHARD E. HOLTON.

